So current hypothesis is that it is a problem with the release
version

of 4.4.3. Moreover I just commited some patches which should allow

correct visualization of characters under Linux (at least for me
works

on Red Hat Enterprise with Linux 2.6.9-78.0.1.ELsmp)

The problem is that a statusbar update is asked while in a paint
event (see relevant backtrace snippet below). Older version of Qt
did not complained but Qt4.4 changed the way child widgets are
painted. We had the same crash in LyX when Qt4.4 was released. The
solution was simply to remove the statusbar update call in the
paint event. As a general rule, don't do any painting (even onto a
pixmap) inside a paint event.

Thanks Abdelrazak. But I cannot see where I violate the rule you are
suggesting. status bar updates are issued outside paint events (as
far as I can see with gdb) and I also tried to remove them without
success.

Weird... But I am pretty sure that the status bar is guilty here.

I agree something strange is going on I will indagate further.

Moreover it is really strange that the program works with the debug
version and not with the release one, without giving warning.

The event in question might be delayed in debug mode so that this bug
is not triggered.

This could be true.

Could you point me to some relevant documentation about this issue
(trolltech docs or mailing list posts...).

There is our bug report which contains a number of link to other bug
reports and discussion:

I really do not undertand but it is clear that the current status of
the port is very instable under Linux (at least with Q4.4/release).
Alvaro is experiencing another type of crash but I think that his is
related to some problems with 64 bits.

What is the build system ogf TeXMacs? If CMake, scons or QMake, I can
try to compile it under Windows...

uses plain configure/make, it should work under mingw but I'm not sure.

Then I won't try, autotools in mingw/msys is a mess. We switched away
from it for LyX purpose and we just use MSVC2008.

Joris know better the status of the WIndows code (for the moment Qt is
responsible only for GUI, pipes and signals are managed internally by
TeXmacs).

I retrieved now the cvs version.
Abdel.
PS: I put back the list in copy because you mentioned Joris.